Safety razor



F. J. MEHL SAFETY RAZOR Aug. 24, W43..

Filed June 18, 1941 INENTOR. l J1. @HL

ATTORNEY.

Patented Aug. Z4, 1943 SAFETY RAZOR `Fred J. Mehl,-Wichita, Kans., assignor,` by direct and mesne assignments,` of thirty-seven` and ione-:half per cent to Ulyssesl G. Charles, and

'1- tWenty-iive per 'cent' to Guy C. Boling, both of Wichita, .Kans.

4Application"June'18, 1941, Serial Nol 398,554

(Cl. Sil- 43) 2 Claims.

"This inventionl relates' to a Vsafety razor, and

more particularly toa razor having' a'motor actuated bladaand has for its principal object a blade having two lcutting edges "oppositely distaken on line i--l in Fig. 3, showing each'cutting edge of the blade engaging beneath its respective guard element. Y

Fig. 2 isa side view of the head, While'FigjS posed, each edge having asingle guard silb'stan-A 5 is a plan View thereof. ltially in parallelismwith the edges of the blade, 4 is a cross section taken online @Pei in or the edge ofthe guard'and'its respective edge Fig. 3 f of the .blade may bejnonparallel, whereby a Fig. 5 is a similar View to that ofFig. 1;'sho'wshearing movement of the blade is means to out ing the ends of the guard above the blade as rebeard more easily and beginning at; one` end taining means therefor, While the side edges are rather .thanto cut the'entire' length ofthe blade adapted to engage above their respective vrside simultaneously. n guard, and Fig. 6 is a cross section taken on line A' further objectof'this invention istoprovide 6-5 in Fig. 5, showing the edges of the blade' in a razor'for .dry shaving, and by'rocking movel oneA relative position of the guards or terminal ment of the body of the razor will engage one edge-A ,15 LAof the side Walls, vthe Ashaft and gears being in at atifne as the razor ismoved in Vits slantingdielevation, rection with respect to the body or handle of the Fig. 7 is a cross section throughV a bladeand razor, and by anerect' positionivith respeotto the blade carrying plate as modified. surface being shaved, both! edges Will function 8 is a sirnilar sectional view to that shown simultaneously* to avoid omission that otherwise, in Fig. 1 except modifying the method of driving may occur Witha single edge engagement. .the blade carrying plate.

,A still'further object lofthis invention'is to Fig. 9 is an inverted plan View taken on line provide a scissor Contact for the'entire length of S- in Fig. 3,'looking in thedirection of the the vbladeas it moves along the-surface of a arrows. v growth of beard. f Fig. 10 is a modification for the carrying plate A still/further object'of this invention is toi',` to secure the blade against longitudinal and provide asimple and-efficient means to remove transverse displacement when the razor is in andreplace the cutting'bla'de and furthermore to action.

Vprovide a simple and efficient means for oscilla- Fig, 11 is a sectional view taken on line l l-il tory movement Vof the'bladebythe rotation of 30 in Fig-.1o.

'a singleV drive shaft, whereby the blade is moved' .l Fig, 12 is a modification of the securing means longitudinally Aand transversely 'along a'circular ,to the carrying plate, parts remo-ved for con- --path venience of illustration.

i A still further Vobject of this invention is to Fig. 13 is an end elevation of the head, Where- Vconstruct a power-driven vsafety razor thatwill in the guard structure is hingedv at one side to produce'a mildmassage forfthe face as the head i rock fromengagexnent with the blade and car- -of the razor is moved'thereover, and the razor rying plate therefor. as atvhole being simple'econornicalto construct, The following is a detailed description of the and efficient-'inits'perforrnance. constituent parts ofjthis invention, consisting of 'These'an'd' other objects will hereinafter be 40 a body portion i, the motor containing portion kmre fully eXpaled, Ifelllbeilghad"SQ theof which is removed, While the other portion, accompaliymg drawing f0'm-ng 9H part 0f this converging from the body Withrespect to its 'Speccatln and 1,1? Whmhhke Chma'ters Wm sides, contains the elements of the shaving head, 'apply tf-1lke+parts`1l1`the duerent WSWS' 45 .a portion of which vis integral with the body, con- .Befgnmg .J3 HBS di awmg. that forms, part sisting of side Walls `2 randlhaving. formed at its of this specification, attention 1s rst directed Outer eytremt l ,h n. a ad 4that the motive powen'whether electric or othery a gea Oumo compmsv 9' ivvise iruechanicallyfdriven, has `been omitted for out?. 'anfnne Walls 3 and a resaectwely Sad Convenience of niustrationgbut will be applied Walls bemg spaced @Daft and'hvmg posltfmd at the discretion of fthe manufacturer with re- Y therebetween. master gear 5 Seemed t@ the end Spgct to the-style of the meto?, and inasmuch as f Of a drive 5 is journaued Va/ll 3, the invention @f this application resides in the While Wall'hais an opening A through which Said structural parts o`f vthe shavinghead as disclosed, gear 5W11 DaSS f01 CGHVeIenCe Of assembly, and note: f i the said gear being in mesh with a pair of gears iFig. l is a cross section -of the head elements, 7 Oppositely diSilOSed With TGSDeC t0 the damovement thereoic as said discs are rotated with'.

their respective gears l, the said carriage plate,

being the carrying means for a shaving blade Il seated thereon, said blade having oppositely disposed cutting edges B that extend longitudinally of the blade. The said carriage has a pin I2 spaced inward from each end thereof and being on the center axis of the carrying plate with respect to cross section, and extending outwardl from the upper side of the carrying plate, said blade having an aperture therethrough at each of its ends corresponding with the pins to engage thereon as securing means for the blade against longitudinal and transverse movement as the carrying plates move; and furthermore said blade is retained against outward or upward movement by the ends C of a guard I3 engaging thereover, said portion C being arced inward as shown in Fig. 3 as a means to permit engagement of the entire length of the cuting edges. In other words, the terminal ends of the blade. cutting edges to be in close proximity to 'the ends of the head. consists of divergent side walls to coincide with the convergence of the head and being secured thereover by screws I3', the ends of the guard being in parallelism as shown in Figures 1 and 2.

Along each side of the guard at its outer extremity is an integrally joined flange D extending inward toward each other, the inner extremity of each adapted to coact with the cutting edges of the blade Ito cut beard, as said beard enters between the blade edges and their, respective flanges, and furthermore said flange to function as a guard to avoid cutting of a patron during the course of shaving. Y

VIt will be seen in Figs. 4 and 6 that the cutting edges of the blade may be arranged to engage below or above the flanged guard, andwhen positioned above the guard the iange extension for the side may be omitted as shown in Fig 6; in case of the latter the carrying plate may be omitted and the blade increased in thickness. if so desired. However. in either case. the face is well protected the upper extremity of the guard and side of the blade coact as safetv elements against the cutting edges of the blade; and furthermore, the space between the blade edges and their respective guards is comparativelv narrow at the maximum point of separation. burr open sufficient for the beard of the face to enter therebetween. it being understood that the cutting process takes place at each edge of the blade alternately and under high velocit-v of movement.

In Figs. 8 and 9 is illustrated a ymethod ot moving a carrying nlate I A bv the drive shaft, in which instance said .shaft has a disc I secured to the end therenf and on which is eccentrically positioned a nin Ui. said nin engaging in an aperture, centrally positioned in the carriage as shown at E in Fig. 9, the eccentric sweep' of which is indicated bv dotted lines E' in saidgure, It will be seen that this arrangement will eliminate the said gear Vhousing and gears. a wall Il, said wall having a pair of cylindrical Otherwise, the guard pins I8 upwardly extending and integrally joined to the wall, each pin being equally spaced outward from the drive shaft in diametrical alignment therewith, and each adapted to engage in their respective aperture I9 that is correspondingly positioned in the carriage, said apertures being of greater diameter than that of the pins to allow for the eccentric stroke of the disc pin, whereby said carriage is rocked with an oscillatory movement while the said pins I8 will restrict against opposite rocking movement of Athe ends of the carriage as the shaft turns.

Note that the carriage is modified to carry the blade, the modication being to provide a lip 20 extending upward at each end of the carriage, between which the ends of the blade will snugly engage to avoid longitudinal movement as the carriage moves, and the said lips each have a transversely positioned lip 2| at each end thereof, said portions at the upper extremity to conform to the bevel of the blade as shown in Fig. ll; the ends being thus seated, will avoid transverse movement of the blade, it being understood that the arced extension of the guard as shown in Fig. 3 is means to avoid upward or outward movement of the blade as the arced portion extends Well over its respective end of the blade.

In Fig. 12 is shown a modied method to secure a blade 22 to a carriage 23, the carriage having an arced shoulder G at each end thereof between which the arced ends ci the blade 22 will engage, coinciding with the shoulder. Positioned on each shoulder is a headed pin 24 eccentrically pivoted and adapted to turn to and from engagement with the blade as a simple and efficient means to secure the blade, in which instance, the head of the pin will be concealed by the inward arc of the guard but not in contact therewith.

In Fig. '7 is shown a modified form for a razor blade 25, the sides of which are convex, while the carriage seat for the blade is concavo to In lieu of the housing, there is positioned coincide with the blade, and to avoid longitudinal or transverse movement of the blade during oscillatory movement there is positioned near each end of the carriage 25 a pin 2l rigidly secured and adapted to engage in an aperture through the blade correspondingly, the blade being secured against upward movement by the arcuate ends of the guard engaging thereon.

In Fig. 13 is shown a modication for the guard 23 in which case the body portion of the guard has been decreased in depth and hingedly connected at one side as at H to rock to and from engagement with the end of the head, and being secured, when rocked to engagement, by a ball and socket arrangement as shown at K on the side opposite the hinge, and such other modi- Iications may be made as lie within the scope of the appended claims.

Having fully described this invention What is claimed as new, and desired to secure by Letters Patent is:

l. In a safety razor, a hollow body portion comprised of side and end walls, a drive shaft trunnioned in the body, an elongated blade substantially rectangular in form and having two cutting edges oppositely disposed and positioned longitudinally of the blade, a carriage plate for the blade, and means to move said plate and blade longitudinally and transversely in circular motion, said means being actuated by the said shaft, and a guard carried by the body portion, said guard having a portion in parallelism with Y each edge of the blade coacting therewith to blade carrying plate by pins eccentrically carried by said gears to oseillate the plate, said plate carrying said blade therewith, a guard and means to removably secure the guard to the body portion, said guard having a rectangular openingr at its outer extremity and being in registry and equaling in width to that of the blade with respect to its cutting edges whereby the edges of the blade will alternately engage their respec- Y 10 tive sides of the guard as the blade oscillates.

FRED J. MEI-IL., 

